Improvement in magneto-signal apparatus



Gr. L. ANDERS. Magnetic Signal Apparatus.

No. 200,963. Patented March 5,1878.

Imenfior. z 44 4% 1M2 WASHINGTON 0 c UNITED STATESPATENT OFFICE.

GEORGE L. ANDERS, OF BOSTON ASSIGNOR TO E. BAKER IVELGH, OF CAMBRIDGE,MASSACHUSETTS.

IMPROVEMENT IN MAGNETO-SIGNAL APPARATUS.

Specification forming part of Letters Patent No. 200,963, dated March5,1878; application filed October 10, 1877.

To all whom it may concern:

Be it known that I, Gnonen LEE ANDERS, of Boston, in the county ofSuffolk and State of Massachusetts, have invented a new and usefulImprovement in Magneto-Signal Apparatus, of which the following is afull, clear, and exact description, reference being had to the drawingaccompanying and forming part of this specification.

The invention consists in the combination, with a magneto-generator, ofa'device which, when the generator is operated, prevents thetransmission of, or short-circuits, a certain definite number ofcurrents, and thereby causes the production of a certain definite signalupon suitable receiving apparatus operated by the currents produced bythe generator.

In the accompanying drawing, Figure 1 is a view of the apparatus inperspective. Fig. 2 is a plan view of the same. Fig. 3 is a view of thecircuit-breakin g disk when the current is short-circuited and Fig. 4 isa view of the same, showing its position when the current is sent to theline.

In these several figures the same letters refor to the same parts.

A is the magnet of the generator, and B is its rotating armature, uponthe shaft of which is a pinion, G. This pinion gears with a toothedwheel, D, having its bearing in one of the arms of the magnet. Upon theshaft of this toothed wheel, and turning with it, is a disk, E, upon theperiphery of which are projections corresponding in size and number tothe signal which it is desired to transmit; or, instead of havingprojections, the disk may have upon its periphery suitable spaces filledwith an insulating substance, as is common in circuit-breaking devices,which will efiect the same result as the projections. F is a flatspring, connected with the armature by a wire, I), and is soarrangedthat, as the disk rotates, it comes in contact withtheprojections 0r equivalent spaces upon the disk, and thus causes thecurrent, which otherwise would pass to the line a ,,to beshort-circuited through the wire b and instrument as long as the springremains in contact with the projections or corresponding spaces, andthus the flow of currents from the generator to the receiving instrumentis interrupted for a corresponding time, and a definite andcorresponding signal given, which will be repeated at each rotation ofthe disk.

I have represented the device as applied to a Siemens magneto-generator.It is obvious that with suitable modifications, which would readilysuggest themselves to the mechanician it can be applied to any otherform of generator.

The invention is applicable to signaling where it is desired to transmitan invariable and determined signal--as, for example, in the firealarmsystem. lVhen thus used one of these instruments will be placed at eachalarmbox, and each will have a different arrangement of projections orspaces upon its disk. By turning the armature of the generator a signalcorresponding to the number of the box will be transmitted to thecentral station. What I claim as my invention, and desire to secure byLetters Patent, is

1. Amagneto-generatorprovidedwithmechanism whereby short circuits areautomati cally established or broken at definite intervals on theoperation of the machine, substantially as and for the purpose setforth.

2. The combination, with the rotating armature of the generator, of thedisk E and arm F, and gearing connecting the disk to the armature,substantially as and for the purpose set forth.

In witness whereof I have hereunto signed my name.

GEO. LEE ANDERS.

Witnesses:

ALEX. L. HAYES, CHAS. W. HOBART.

